| 摘要 |
PURPOSE:To contrive to allow a machining pin to hold a lens to be trained toward the sphercial center of a tool rest in such a way that a parallel link mechanism is installed on the main link which is rocked by a cracnk in a lens grinder and one end of this link is arranged to slide on a guide member. CONSTITUTION:A main link 10 is swingably driven by a crank 15 through a pin 10. When a main supporting link 20 is rocked on a pin serving as the fulcrum, following rocking of the main link 10, an arm 41 moves integrally with the supporting link 20, instead of turning on a pin 40 serving as the fulcrum. In order to move a machining pin 27, following the surface to be machined of a tool rest by means of a link mechanism consisting of the main link 10 and a main supporting arm 20, the machining pin 27 is moved on a routine such as d1 d2 d1 d3, also a roll member 42 at the free end part of the arm 41 is moved along a guide face 45a, so that it may entirely follow the surface to be machined of the tool rest 3. |
